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Message-ID: <4EF31CDC.20201@zepler.net>
Date: Thu, 22 Dec 2011 12:04:44 +0000
From: Chris Smith <cjs94 AT zepler DOT net>
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To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Mentor PowerPCB/PADS import to PCB
References: <4EEF4F89 DOT 2080303 AT zepler DOT net> <20111219102635 DOT 3cf811c6 AT svelte>
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On 19/12/2011 18:26, Colin D Bennett wrote:
> On Mon, 19 Dec 2011 14:51:53 +0000
> Chris Smith <cjs94 AT zepler DOT net> wrote:
>=20
>> What I'm hoping to achieve is either to import the reference
>> design into PCB, or at least overlay each layer so I can trace
>> over it with PCB.  I haven't used PowerPCB/PADS before, but I do
>> have limited access to it so I can export the reference in
>> whatever format may help.
>=20
> The simplest way, although not ideal, would be to export the
> reference design layout to a bitmap image (PNG) and use it as the
> pcb background image for your layout session.
>=20
> I have used the background image feature to create boards where I
> precisely match pin header locations and board outline to an
> existing board.

Thanks, I'll give that a go.

> Just make sure you get the scale right by setting you PCB layout
> =E2=80=9Cboard size=E2=80=9D to exactly the size that your background i=
mage extents
> would indicate -- pcb will stretch the background image to fit any
> board size.  You probably won't know the actual size of the
> background image in mm or mil exactly, though, since there is
> probably going to be some padding or margin around the board
> itself.  You can measure the actual mm/pixel in the GIMP if you
> have two precise reference points in the reference design file, and
> from that calculate the PCB board size setting.

The BGA will be included in the image, so I can use the balls as
reference points.

Chris
--=20
Chris Smith <cjs94 AT zepler DOT net>


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